package com.itheima.config;


import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

/**
 * @author hebing
 * @version 1.0
 */
//表示配置类
@Configuration
@Slf4j
public class WebMvcConfig extends WebMvcConfigurationSupport {

    /**
     * 扩展消息转换器
     * @param converters
     */
    @Override
    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        log.info("扩展消息转换器...");
        //创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
        //设置对象转换器，底层使用Jackson将Java对象转为json
        messageConverter.setObjectMapper(new JacksonObjectMapper());
        //将上面的消息转换器对象追加到mvc框架的转换器集合中
        converters.add(0, messageConverter);
    }

    //告诉springMvc按照这个寻找路径
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        //System.out.println("来调用方法了~！~");
        log.debug("来调用方法~！~");

        //配置映射地址和资源路径
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/static/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/static/front/");
    }
}
